P0AB2
DTC P0AAD-P0AAF or P0AB2-P0AB4
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P0AAD
- Hybrid Battery Pack Air Temperature Sensor 1 Performance
DTC P0AAE
- Hybrid Battery Pack Air Temperature Sensor 1 Circuit Low Voltage
DTC P0AAF
- Hybrid Battery Pack Air Temperature Sensor 1 Circuit High Voltage
DTC P0AB2
- Hybrid Battery Pack Air Temperature Sensor 2 Performance
DTC P0AB3
- Hybrid Battery Pack Air Temperature Sensor 2 Circuit Low Voltage
DTC P0AB4
- Hybrid Battery Pack Air Temperature Sensor 2 Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The drive motor generator battery assembly has an air inlet and air outlet temperature sensors. The air inlet and air outlet temperature sensors are located on the inlet and outlet air ducts of the hybrid battery vent fan. The air inlet temperature sensor is referred to as sensor 1 and the air outlet temperature sensor is referred to as sensor 2. The air temperature sensors are a variable resistor that measures the temperature of the inlet and outlet air. The control module supplies 5 V to the signal circuit and a ground for the low reference circuit. The air inlet and outlet temperature sensor resistance changes with temperature. The lower the temperature, the higher the resistance of the sensor. The higher the temperature, the lower the resistance of the sensor. The drive motor generator battery control module (BECM) uses the air inlet and outlet temperature sensors to determine if air is circulating through the drive motor generator battery assembly.
Conditions for Running the DTC
* The ignition is ON.
* The 12 V battery voltage is 9-18 V.
Conditions for Setting the DTC
P0AAF and P0AB4
The hybrid battery pack air temperature sensor 1 or 2 is less than -40°C (-40°F).
P0AAE and P0AB3
The hybrid battery pack air temperature sensor 1 or 2 is greater than 95°C (203°F).
P0AAD
The hybrid battery cooling fan is ON and the difference between sensor 1 and 2 is greater than 10°C (50°F) difference for 9 seconds.
P0AB2
The hybrid battery cooling fan is ON and the outlet air temperature is greater than maximum hybrid battery temperature value by 10°C (50°F) for 9 seconds.
Action Taken When the DTC Sets
* DTCs P0AAD, P0AAE, P0AAF, P0AB2, P0AB3, and P0AB4 are type B DTCs.
* The drive motor generator battery sends a message to the hybrid powertrain control module to reduce the power by 50 percent.
Conditions for Clearing the DTC
DTCs P0AAD, P0AAE, P0AAF, P0AB2, P0AB3, and P0AB4 are type B DTCs.
Reference Information
Schematic Reference
Hybrid Cooling Schematics Hybrid Cooling Schematics
Connector End View Reference
Component Connector End Views Connector Views
Description and Operation
Drive Motor Battery Cooling Description Drive Motor Battery Cooling Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Control Module References for scan tool information
Special Tools
EL-48900 HEV Safety Kit
Circuit/System Verification
1. Verify that DTC P0A80, P0A81 or P0BBD is not set.
• If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
2. Ignition ON, using a scan tool, command the hybrid battery pack fan speed to 60 percent and let it run for 2 minutes.
3. Observe the scan tool hybrid battery air inlet and outlet temperature parameters. The readings should be between -39 and +95°C (-38.2 and +203°F) with no greater than a 10°C ( 50°F) difference. Refer to Temperature Versus Resistance Temperature Versus Resistance.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling High Voltage Disabling.
2. Verify that none of the following conditions exist:
* the inlet and outlet air vents do not have any obstructions or blockages
* the vent fan blades are not broken or damaged
* the internal foam seals are not missing or damaged
• If any conditions are found, remove, repair or replace as necessary.
3. Ignition OFF, disconnect the X3 harness connector at the drive motor generator battery control module.
4. Test for 1k ohm-209k ohm between each of the terminals listed below. The resistance of each temperature sensor should be within the specified range, and within 500 ohm of each other. Refer to Temperature Versus Resistance Temperature Versus Resistance.
* Sensor 1-5 V reference circuit terminal 9 and low reference circuit terminal 10
* Sensor 2-5 V reference circuit terminal 11 and low reference circuit terminal 12
• If not within the specified range, replace the drive motor battery sensor module wiring harness.
5. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Drive Motor Battery Sensor Module Wiring Harness Replacement Drive Motor Battery Sensor Module Wiring Harness Replacement
* Control Module References Control Module References for drive motor generator battery control module replacement, setup and programming